Lock



FIG. 1 is a perspective view of a lock showing my new design.

FIG. 2 is a front view of the lock.

FIG. 3 is a rear view of the lock.

FIG. 4 is a left side view of the lock.

FIG. 5 is a right side view of the lock.

FIG. 6 is a top view of the lock.

FIG. 7 is a bottom view of the lock; and,

FIG. 8 is another perspective view of the lock, shown in an open configuration.

The grayscale shading in the drawings represents contrast and forms part of the claimed design. 

CLAIM The ornamental design for a lock, as shown and described. 